From "Gear-Head". A gear bigot is a car enthusiast prejudiced against certain automotive marques because of their country of origin; a domestic car enthusiast who, unaware of the high performance nature of many foreign cars, continues to think if it is not a Detroit product, it's not high-performance; a person who uses derisive terms to refer to foreign cars, i.e., "ricer", "rice-burner", "kraut can", etc.;
a person who doesn't care once-foreign cars are manufactured in the USA and continues to refer to them as
"imports" but by derisive terms.

He won't consider buying any car with a foreign-sounding name, even though it's made in the USA. He's a real gear bigot.